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EFFECT OF SOLARIZATION AND AMENDMENTS ON THE PINE DAMPING OFF AND SOIL PROPERTIES | ||
| Mesopotamia Journal of Agriculture | ||
| Article 1, Volume 38, Issue 0, 2010, Pages 2-11 PDF (0 K) | ||
| DOI: 10.33899/magrj.2010.34315 | ||
| Author | ||
| Wazeer A. Hassan | ||
| Abstract | ||
| The effects of solarization using polyethylene mulching for 45 and 60 days combined with soil amendments of chicken manures (CM), mixed fungicides of metalayxl 2g and benlate 1.5g L-1 (Met.&Ben.), biocontrol agent of Trichoderma harzianum (T.h.). and NPK fertilizers 180kg N h-1 on the pine damping off in Malta nursery had been ascertained in Summer 2008. Pre-emergence damping-off on the pine seedlings grown in dry soil was 83.33% with disease severity of 60%, while solar heating for 45 days reduced the disease occurrence to 45% and its severity 11.67%. Amendments of CM., Met. & Ben., and T.h. after 60 days controlled disease to a lesser extent than other treatments. Obvious increasing of organic matter, 2.63%, NH+4– N 0.08 g N and NO–3 – N 0.05 g N 100g-1 soil in addition to soluble nutrients of P 8.91 mg and K 0.035 Meq K 100g-1 soil was recorded in the mulching soil. At the same time composted heating plots decreased C/N ratio to relatively optimal levels of 15.75 and 18.59 after both of solar periods, alkaline soil pH (8.41 – 9.56) did not incongruous with the efficiency of biocontrol T.h. in the decomposition of organic matter and availability of the most nutrients even in the solarized soil. | ||
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